Antiknock fitting



April 24, 1956 A. J. LUZYNSKI 2,742,928

ANTIKNOCK FITTING Filed Jan. 26, 1953 United States Patent@ ANTIKNOCK FITTING Anthony J. Luzynski, Philadelphia, Pa. Application January 26, 1953, Serial No. 333,025

3 Claims. (Cl. IS7-533.21)

The present invention relates to a water fitting designed for anti-knock purposes and is concerned primarily with a device which positively insures the complete elimination of knocking or hammering when hot waterl is drawn from a faucet.

It is now the common practice to provide hot water by utilizing coils which are heated with the cold water supply communicating with the intake end of the coil and hot water being drawn olf the outlet of the coil. Ordinarily a faucet is connected to this outlet end and it has been found that a knocking or hammering is created particularly immediately after the faucet is closed. While attempt has been made to eliminate this hammering, the now known devices have not proven satisfactory and the present invention has in view as its foremost objective the provision of a fitting that will positively and completely obviate this undesirable feature.

A further object of the invention is to provide a fitting of the character indicated which consists essentially of a casing that defines a main chamber that includes a valve seat and a baille, the upper edge of which is spaced from the valve seat. Directly below the valve seat there is an intake connection that is connected to the hot water coil. The casing extends outwardly from one side of the bae and is provided with a connection to which a, faucet is adapted to be connected. The casing is continued up above the valve seat and at one side is formed with a by-pass connection. Above this by-pass, connection there is another connection to which a pressure chamber is connected. The by-pass is connected to the cold water supply and a valve that cooperates with the valve seat is mounted in a guide that is carried by the battle.

Another important object of the invention is to provide, in a fitting of the character indicated, a valve member that is formed with a small aperture through which water passes so that a slight amount of the cold water will be mixed with the hot water while the latter is drawn from the casing.

With the foregoing arrangement and with the valve in closed position on its seat, when the faucet is open the hot water will pass upwardly from the coil into the casing at the connection of the coil thereto and up and around the bale beneath the Valve and out through the faucet. As this action takes place, a small amount of cold water is drawn through the aperture in the valve member and mixed with the hot water. When the faucet is shut off a certain amount of back pressure is created. This back pressure raises the valve member from its seat and permits the hot water, together with any steam or air which may be entrapped therein, to pass upwardly into the pressure chamber. When a normal condition is restored, the weight of this water as well as that of the cold water supply, together with the pressure of any air or steam which may be present in the pressure chamber, forces the valve member back onto the valve seat.

From the foregoing it is apparent that the valve member is raised and lowered from its seat and must be guided 2,742,928 v'Patented Apr. v2&1, 1956 ICC during these movements. Thus another object of the invention is to provide in a tting of the character indicated, a valve member having a stem that is slidably received in a guide that is carried by the baille.

Various other more detailed objects and advantages of the invention, such as arise in connection with carrying out the above noted ideas in a practical embodiment, will in part become apparent and in part be hereinafter stated, as the description of the invention proceeds.

The invention therefore comprises an anti-knock tting that consists essentially of a casing having an upwardly extending cylindrical portion and` an outwardly extending conduit communicating therewith. The upwardly ex tending cylindrical portion is provided with a valve seat immediately above the joinder of the outwardly extending conduit thereto. Below this valve seat is an inclined baiilehaving an upper edge spaced from the valve seat. Cooperating with the valve seat is a valve member formed with an aperture and having a stem that is received in a guide carried by the baffle. Below the joinder of the outwardly extending conduit there is an intake connection to which a hot water coil is adapted to be connected. At the free end of the outwardly extending conduit there is a faucet connection, while above the valve seat there is a by-pass connection. A pressure chamber is mounted on the upper end of the upwardly extending portion of the casing above the by-pass connection. From this by pass connection a bypass extends and is connected to the cold water supply.

For a full and more complete understanding of the invention, reference may be had to the following description and accompanying drawing wherein:

Figure l is a vertical section through the iitting of this invention and associated conduits as well as the pressure chamber with the latter being broken away, and

Figure 2 is a diagrammatic illustration showing how this litting is connected with the heating coils and the cold water supply.

Referring now to the drawing wherein like reference characters denote corresponding parts and, rst, more. particularly to Figure 2,` a heating coil is therein illustrated and referred to, in its entirety, by the reference characber C, the coil C includes an intake at 1i) and an outlet at 11. A cold water supply is represented at 12 and is connected to the intake 10 with a by-pass connection being indicated at 13. The fitting of this invention is; referred to in its entirety by the reference character F and is connected to the upper end of the. outlet 11.

Referring now more particularly to Figure l, the fitting E comprises a casing including an upwardly extend-ing cylindrical portion 14 with which communicates an outwardly extending conduit 15 which terminates at a connection 16 to which a faucet or other suitable, comparable device may be connected. Such a faucet is represented at 17 in Figure 2.

The upwardly extending portion 14 of the litting F is formed with a valve seat 1S immediately above the joinder of the conduit 15 thereto. A baille 19 is shown as having its lower edge connected to the casing at the bottom of the conduit 15 and this baie 19 is inclined over into the upwardly extending casing part 14 with its upper edge being spaced from the valve seat 18. A valve member 30 takes the form of a disk valve having a stem 21 that is received in a guide 22 that is carried by the baiile 19 at its upper edge. This valve member 24B is adapted to assume either the upraised position relative to the valve seat 18 which is illustrated in Figure 1 or be seated thereon as will be later described. The valve disk 20 is formed with an aperture 23 through which cold water is adapted to pass when the valve is in closed position.

The tting Fis formed with a connection at 24 to which` 3 the upper end of the outlet 11 of the coil C is adapted to be connected such as by being threaded therein in the manner illustrated in Figure 1.

Above the valve seat 18, the upwardly extending portion 14 of the casing is formed with a by-pass connection 2S. A by-pass conduit 26 has one end secured to this connection 25 and its other end to the by-pass connection 13.

Carried by the upper free end of the upwardly extending casing part 14 is an elongated cylindrical member 27 having a closed end 28 which provides a pressure chamber 29. This member 27 may be mounted in the casing part 14 in any preferred manner such as by the screw threads represented at 30.

Operation Under normal conditions the disk valve 20 is in closed position on the valve seat 18. When the faucet 17 is opened, hot water will be drawn from the outwardly extending conduit. In order for this action to take place,

the hot water must pass upwardly from the coil outlet through the by-pass 26. As the normal pressure is reo stored at faucet 17, on conduit 15, the valve disk 2i) will again be seated on the valve seat 18 due to the pressure in the chamber 29 which is greater than the pressure at the faucet 17. At this time, the excess pressure in the chamber 29 will force water through the by-pass 26 and around the heating coils, thus causing a circulation of water instead of a sudden stop. it is this manner of accommodating the back pressure which eliminates the hammering or knocking.

From actual experience it has been found that ordinarily there will be no air in the pressure chamber 29. However, should any air or steam become entrapped therein, the operation of the device is actually enhanced and improved rather than being impaired by the presence of such air or steam. However, the device does not depend for its operation on the presence of air in the pressure chamber. It will operate satisfactorily either with or without air being entrapped therein.

While a preferred specific embodiment of the invention is hereinbefore set forth, it is to be clearly understood that the invention is not to be limited to the exact constructions, devices and designs illustrated and described because various modifications of the details may be provided in putting the invention into practice within the purview of the appended claims.

What is claimed is:

1. In an anti-knock fitting, a cylindrical casing having an inlet and an outlet, a conduit near the inlet of said casing outstanding laterally therefrom, a valve seat in said casing adjacent to the wall of said conduit nearest the outlet, a baffle having one end joined to the wall of said conduit adjacent to the inlet with the other end thereof being inclined toward the center of said casing in adjacent spaced relationship with said valve seat, a valve disk cooperating with said valve seat on the side thereof opposite from said conduit, guide means for said valve disk, a faucet connection at the free end of said conduit, a bypass connection on said casing adjacent to the valve seat and valve disk on the outlet side thereof, and a connection for a pressure chamber in the outlet end of said casing.

2. In an anti-knock fitting, a cylindrical casing having an inlet and an outlet, a conduit near the inlet of said casing outstanding laterally therefrom, a valve seat in said casing adjacent to the wall of said conduit nearest the outlet, a bale having one end joined to the wall of said conduit adjacent to the inlet with the other end thereof being inclined toward the ccntcr of said casing in adjacent spaced relationship with said valve seat, a valve disk cooperating with said valve seat on the side thereof opposite from said conduit, the disk being provided with an aperture therein, guide means for said valve disk, a faucet connection at the free end of said conduit, a bypass connection in said casing adjacent to the valve seat and valve disk on the outlet side thereof, and a connection for a pressure chamber in the outlet end of said casing.

3. In an anti-knock fitting, a cylindrical casing having an inlet and an outlet, a conduit near the inlet of said casing outstanding laterally therefrom, a valve seat in said casing adjacent to the wall of said conduit nearest the outlet, a baie having one end joined to the wall of said conduit adjacent to the inlet with thc other end thereof being inclined toward the center of said casing in adjacent spaced relationship with said valve seat, a valve disk cooperating with said valve seat on the side thereof opposite from said conduit, the disk being provided with an aperture therein, guide means for said valve disk carried by said bae, a faucet connection at the free end of said conduit, a by-pass connection in said casing adjacent to the valve seat and valve disk on the outlet side thereof, and a connection for a pressure chamber in the outlet end of said casing.

References Cited in the file of this patent UNITED STATES PATENTS 357,128 Loretz Feb. l, 1887 1,643,082 Nickell Sept. 20, 1927 2,518,212 Wilson Aug. 8, 1950 

